Ok - so installed the fa filter some weeks ago, been running fine.
Today, for example, (1325 on Sat), im gettng 85 birds out to 280 SM.
Unfortunately, I have both the filter and my new V3 from RTL SDR on the receiver side of the amp, not ideal - especially as I want to enable bias t on the V3 to power the hab.
So, currently rig is…
Ant / coax > F SMA > Hab M sma > Hab > Hab SMA > F/F SMA coupler > fA Filter M > SMA F > V3 M.
This works, and gives c85 birds, as above.
Now, if I change this to…
Ant / coax > F/SMA > fa Filter M > fA filter F > Hab M > hab M > f/f coupler > V3
Birds drops down to about 15, at really close range?
What am I doing wrong, and whats the solution?
Almost looks like the fA filters functionally directional?